import { i18n } from "./setupI18n";

interface I18nGlobalTranslation {
	(key: string): string;
	(key: string, locale: string): string;
	(key: string, locale: string, list: unknown[]): string;
	(key: string, locale: string, named: Record<string, unknown>): string;
	(key: string, list: unknown[]): string;
	(key: string, named: Record<string, unknown>): string;
}

function getKey(namespace: string | undefined, key: string) {
	if (!namespace) return key;

	if (key.startsWith(namespace)) return key;

	return `${namespace}.${key}`;
}

export function useI18n(namespace?: string): {
	t: I18nGlobalTranslation;
} {
	const normalFn = {
		t: (key: string) => {
			return getKey(namespace, key);
		},
	};

	if (!i18n) return normalFn;

	const { t, ...methods } = i18n.global;

	const tFn: I18nGlobalTranslation = (key: string, ...arg: any[]) => {
		if (!key) return "";
		if (!key.includes(".") && !namespace) return key;
		return t(getKey(namespace, key), ...arg);
	};
	return {
		...methods,
		t: tFn,
	};
}

// Why write this function？
// Mainly to configure the vscode i18nn ally plugin. This function is only used for routing and menus. Please use useI18n for other places

// 为什么要编写此函数？
// 主要用于配合vscode i18nn ally插件。此功能仅用于路由和菜单。请在其他地方使用useI18n
export const t = (key: string) => key;
